Merriam-Webster Logo
SINCE 1828
Menu
×

An Encyclopædia Britannica Company

troland

noun tro·land \ ˈtrō-lənd \
See What's Trending Now See More Trending Words

Definition of troland

: a unit of intensity of light at the retina equal to the illumination received per square millimeter of a pupillary area from a surface having a brightness of one candle per square meter

Origin and Etymology of troland

after Leonard T. Troland †1932 American psychologist and physicist

Medical Dictionary

troland

noun tro·land \ ˈtrō-lənd \

medical Definition of troland

: photon 1

Biographical Note for troland

  • Troland, Leonard Thompson (1889–1932), American psychologist and physicist. Troland was a university instructor of psychology and a practical engineer. He devised most of the photographic and mechanical apparatus for color motion pictures. In 1922 he wrote a monograph summarizing the current state of visual science. In 1929 and 1930 he published a major two-volume treatise on the principles of psychophysiology.

    • Seen and Heard

    What made you want to look up troland? Please tell us where you read or heard it (including the quote, if possible).

    show hide

    Love words? Need even more definitions?

    Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

    WORD OF THE DAY

    mollycoddle

    play

    to treat with excessive attention

    Get Word of the Day daily email!

    TRENDING NOW

    1. pansexual 'sexual desire or attraction...not limited to a particular gender identity or sexual orientation'

    2. symbiote 'an organism living in symbiosis'

    3. charlatan 'faker or fraud'

    4. lowlife 'a person of low moral character'

    5. kakistocracy 'government by the worst people'

    SEE ALL

    BROWSE DICTIONARY

    troland

    Test Your Vocabulary

    April 2018 Words of the Day Quiz

    • rain-on-rainbow-umbrella
    • Which is the best synonym of traduce?
    Name That Thing

    Test your visual vocabulary with our 10-question challenge!

    TAKE THE QUIZ
    SCRABBLE® Sprint

    Test Your Knowledge - and learn some interesting things along the way.

    TAKE THE QUIZ

    Love words? Need even more definitions?

    Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

    Words at Play

    alt-5ae23d5d250bd
    'Rather Than': Is It a Conjunction or Preposition?

    It's both, and here's why.

    alt-5ae227cf365c4
    ‘Magnate’ and ‘Magnet’: Poles Apart

    This is kind of a Big Deal

    image278155226
    All the Hits

    8 obscure words for bodily harm

    alt-5adf93a49b0b2
    The Fossil Encased in "Case In Point"

    "In point" only lives in this phrase.

    Ask the Editors

    image1760257654
    2017 Word of the Year: Behind the Scenes

    How we chose 'feminism'

    video-title-words-of-the-year-1066
    Words of the Year: 1066

    Or, Why Pig Meat is Called 'Pork' and Cow Meat is Called 'Beef'

    video-literally
    Literally

    How to use a word that (literally) drives some people nuts.

    video-his-or-her
    Is Singular 'They' a Better Choice?

    The awkward case of 'his or her'

    Word Games

    rain-on-rainbow-umbrella
    April 2018 Words of the Day Quiz

    The rhyming verb edition.

    Take the quiz
    image1926873504
    Odd Habits and Quirks Quiz

    Test your knowledge of strange human behaviors.

    Take the quiz
    Name That Thing
    Name That Thing

    Test your visual vocabulary with our 10-question challenge!

    Take the quiz
    SCRABBLE® Sprint
    SCRABBLE® Sprint

    SCRABBLE® fans, sharpen your skills!

    Play the game